| Name | Meaning | Gender | Origin |
|---|
| Prince | Royal son | Male | English |
| Princess | Royal son | Female | English |
| Puddles | | Unisex | Hebrew |
| Puff | Expelling breath, a gust of wind or a small amount of smoke. | Unisex | English |
| Pumpkin | Large round fruit with orange skin | Unisex | English |
| Quentin | Fifth | Male | Latin |
| Quick | Speedy and fast. | Unisex | English |
| Rags | | Unisex | Hebrew |
| Rain | Rain | Female | English |
| Rascal | One that is playfully mischievous | Unisex | English |
| Red | Red | Unisex | English |
| Rei | Salute | Female | Japanese |
| Reno | Ruler with counsel | Unisex | Germanic |
| Rich | Well built, hardy | Male | French |
| Rider | One who rides | Male | English |
| Riley | Rye clearing | Male | English |
| Rina | Pet form of names in -rina | Female | English |
| Ripley | Separate | Male | English |
| Rocket | To move swiftly and powerfully | Unisex | English |
| Rocky | Battle cry | Male | Germanic |
| Romeo | Pilgrim to Rome | Male | Italian |
| Romy | Sea dew | Unisex | Latin |
| Rona | Ruler with counsel | Female | Norse |
| Rosie | Rose | Female | Latin |
| Rowan | Little red one | Male | Gaelic |
| Roxy | Star | Female | Persian |
| Ruby | Red | Female | Latin |
| Rudy | Famous wolf | Male | Germanic |
| Rufus | Red | Male | Latin |
| Rusty | Rusty, full of rust | Unisex | American English |